Cotyledon ladismithiensis iegata White Cottony Spots - Causes & Fixes

Jump to cause: Mealybugs Powdery Mildew Cottony Blight (Sclerotinia)

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Mealybugs

Mealybugs are small, soft-bodied insects that secrete a white, waxy, cottony substance to protect themselves. They congregate in the crevices of Cotyledon leaves and stems, sucking sap and weakening the plant.

Very Common

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How to confirm: Use a magnifying glass to look for small, crawling insects tucked into the leaf axils or under the succulent leaves.

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1 Isolate the plant immediately to prevent the mealybugs from spreading to your other houseplants.

2 Treat the infestation by spraying the plant with an organic insecticide or neem oil to kill the insects and remove the waxy coating.

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3 Use a cotton swab dipped in isopropyl alcohol to manually remove visible white cottony clusters from leaf crevices and stems.

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Powdery Mildew

This fungal pathogen manifests as white, flour-like patches on the leaf surfaces. In Cotyledon species, high humidity and poor air circulation around the fleshy leaves can trigger outbreaks.

Common

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How to confirm: Check if the white spots can be rubbed off easily with your finger and if they appear as a surface film rather than a physical mass.

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1 Apply an organic fungicide to the affected leaves to eliminate the fungal spores and prevent the spread of powdery mildew.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

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2 Improve air circulation around the plant and reduce humidity by avoiding overhead watering and ensuring the plant is not crowded.

3 Prune and dispose of any heavily infected leaves to reduce the pathogen load in your growing environment.

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Cottony Blight (Sclerotinia)

While less common in succulents, certain fungal pathogens can produce white, mycelial growth that looks like cotton. This usually attacks the stem base or wounded tissue of the Cotyledon.

Common

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How to confirm: Inspect the base of the plant to see if the white growth is accompanied by soft, rotting stem tissue.

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shopping_cart Recommended Products

1 Remove any heavily infected tissue or stems to prevent the fungus from spreading to the rest of the plant.

2 Apply an organic fungicide to the affected area to control the fungal growth and protect healthy tissue.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

3 Improve air circulation around the plant and ensure the soil is not staying excessively wet, as moisture promotes blight.